Maximum amount of entries in the histogram_bounds


The default limit is presently 100 entries for histogram_bounds and max_common_values fields in pg_stats view. Raising the limit might allow to be made more accurate estimates scanned rows for postgresql planner. Globally, this setting is set by default_statistics_target or can be set on a column-by-column basis using the ALTER TABLE SET STATISTICS command.

What is the maximum value of this setting can be set?

UPD: I found how to look this settings:

Select name, max_val from pg_settings where name='default_statistics_target'


Per the docs (as of 9.3):



This form sets the per-column statistics-gathering target for subsequent ANALYZE operations. The target can be set in the range 0 to 10000; alternatively, set it to -1 to revert to using the system default statistics target (default_statistics_target). For more information on the use of statistics by the PostgreSQL query planner, refer to Section 14.2.


<a href="http://www.postgresql.org/docs/current/static/sql-altertable.html" rel="nofollow">http://www.postgresql.org/docs/current/static/sql-altertable.html</a>


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